Synovate's first-half revenues rose to £144m from £122m in the same period last year off the back of higher orders and connecting local agencies into its worldwide network.
Focusing on its international business, Synovate said it was able to develop local clients into multinational accounts, with 13 out of its top 20 clients serviced in 10 or more countries.
Robert Lerwill, chief executive of Aegis Group, said: "Synovate is carrying forward a comfortably higher order book than last year."
Overall, Aegis has said its first-half pre-tax profit rose to £36.9m from £35.4m last year.
The company also performed well in areas such as digital, communications planning, event marketing and outdoor, bolstering overall group revenue by 14% to £389m.
Media buying services, through Carat and Vizeum, remained mixed across Europe with traditional media buying rates under pressure, the group said.
Its main media planning and buying network Carat France was still recovering from client losses in 2004 while Germany had a flat performance in the first six months to June 30.
Lerwill said: "I am confident Aegis will once again deliver a satisfactory performance for the full year."
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